顶帽变换

I=imread('rice.png'); subplot(2,4,1),imshow(I,[]); thresh=graythresh(I);%自适应确定阈值 thresh=0.5137; Ibw=im2bw(I,thresh) subplot(2,4,2),imshow(Ibw,[]); subplot(2,4,3),surf(double(I(1:8:end,1:8:end))),zlim(

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